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Why are uranium fuel rods inefficient?

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A nuclear reactor needs a couple of things to sustain a stable critical reaction; fuel, moderator, control rods and the proper geometry. The issues for the moderator, control rods and core geometry are all managed by the design and construction, which leaves the fuel. read more

During a nuclear reaction, fuel rods generate a tremendous amount of heat. After most of the fuel has been used, the rods are removed from the reactor and kept in a separate cooling pool nearby. Problems cooling these pools have officials worried that the spent rods could overheat and melt. read more

Nuclear fuel rods, the key component of nuclear fission are made of 2 main parts: uranium and ceramic material. The uranium is of course the fuel part of the fuel rod, and tends to contain 5–20% U-235(this type undergoes fission). The rest is U-238(this is fertile, not fissive). read more

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